LoongArch is a new RISC ISA, which is a bit like MIPS or RISC-V. LoongArch includes a reduced 32-bit version (LA32R), a standard 32-bit version (LA32S) and a 64-bit version (LA64). LoongArch use ACPI as its boot protocol LoongArch-specific interrupt controllers (similar to APIC) are already added in the next revision of ACPI Specification (current revision is 6.4). This patchset is adding basic LoongArch support in mainline kernel, we can see a complete snapshot here: https://github.com/loongson/linux/tree/loongarch-next Cross-compile tool chain to build kernel: https://github.com/loongson/build-tools/releases Loongson and LoongArch documentations: https://github.com/loongson/LoongArch-Documentation LoongArch-specific interrupt controllers: https://mantis.uefi.org/mantis/view.php?id=2203 Huacai Chen(19): LoongArch: Add elf-related definitions. LoongArch: Add writecombine support for drm. LoongArch: Add build infrastructure. LoongArch: Add common headers. LoongArch: Add boot and setup routines. LoongArch: Add exception/interrupt handling. LoongArch: Add process management. LoongArch: Add memory management. LoongArch: Add system call support. LoongArch: Add signal handling support. LoongArch: Add elf and module support. LoongArch: Add misc common routines. LoongArch: Add some library functions. LoongArch: Add 64-bit Loongson platform. LoongArch: Add PCI controller support. LoongArch: Add VDSO and VSYSCALL support. LoongArch: Add multi-processor (SMP) support. LoongArch: Add Non-Uniform Memory Access (NUMA) support. LoongArch: Add Loongson-3 default config file. Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx> Signed-off-by: Chen Zhu <zhuchen@xxxxxxxxxxx> --- drivers/irqchip/Kconfig | 37 +++- drivers/irqchip/Makefile | 3 + drivers/irqchip/irq-loongarch-cpu.c | 87 ++++++++++ drivers/irqchip/irq-loongson-eiointc.c | 308 +++++++++++++++++++++++++++++++++ drivers/irqchip/irq-loongson-htvec.c | 102 ++++++++++- drivers/irqchip/irq-loongson-liointc.c | 140 ++++++++++++++- drivers/irqchip/irq-loongson-pch-lpc.c | 204 ++++++++++++++++++++++ drivers/irqchip/irq-loongson-pch-msi.c | 69 +++++++- drivers/irqchip/irq-loongson-pch-pic.c | 139 ++++++++++++++- include/linux/cpuhotplug.h | 1 + 10 files changed, 1069 insertions(+), 21 deletions(-) create mode 100644 drivers/irqchip/irq-loongarch-cpu.c create mode 100644 drivers/irqchip/irq-loongson-eiointc.c create mode 100644 drivers/irqchip/irq-loongson-pch-lpc.c -- 2.27.0
